Re: [PATCH] 2.6.4-rc1-mm1: vm-kswapd-incremental-min (was Re: MM VMpatches was: 2.6.3-mm4)

[Andrew Morton]

Nick Piggin <piggin@xxxxxxxxxxxxxxx> wrote:
>
> Andrew, I think you had kswapd scanning in the direction opposite the
>  one indicated by your comments. Or maybe I've just confused myself?
> 

Nope, the node_zones[] array is indexed by

#define ZONE_DMA		0
#define ZONE_NORMAL		1
#define ZONE_HIGHMEM		2

Whereas the zonelist.zones[] array goes the other way:
[[[highmem,]normal,]dma,]NULL.

It's a complete dog's breakfast that stuff.  Hard to understand, not very
logical and insufficiently commented.
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